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HOW TO: set readiness monitors for OBD 2

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Old 11-06-2006, 01:13 PM   #1
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Default HOW TO: set readiness monitors for OBD 2

After failing smog for not having the readiness monitors ready, I found this on Wikipedia and thought i would share since it may helpful to some of you.

OBD-II Drive Cycle
(Taken from Understanding OBDII: Past, Present & Future)
The OBD-II drive cycle begins with a cold start (coolant temperature below
122 degrees F and the coolant and air temperature sensors within 11 degrees
of one another).

NOTE: The ignition key must not be on prior to the cold start otherwise the
heated oxygen sensor diagnostic may not run.
1. As soon as the engine starts, idle the engine in drive for two and a half
minutes with the A/C and rear defrost on. OBD-II checks oxygen sensor heater
circuits, air pump and EVAP purge.

2. Turn the A/C and rear defrost off, and accelerate to 55 mph at half
throttle. OBD-II checks for ignition misfire, fuel trim and canister purge.
Hold at a steady state speed of 55 mph for three minutes. OBD-II monitors
EGR, air pump, O2 sensors and canister purge.

3. Decelerate (coast down) to 20 mph without braking or depressing the
clutch. OBD-II checks EGR and purge functions.

4. Accelerate back to 55 to 60 mph at half throttle. OBD-II checks misfire,
fuel trim and purge again.

5. Hold at a steady speed of 55 to 60 mph for five minutes. OBD-II monitors
catalytic converter efficiency, misfire, EGR, fuel trim, oxygen sensors and
purge functions.

6. Decelerate (coast down) to a stop without braking. OBD-II makes a final
check of EGR and canister purge.

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Old 11-06-2006, 01:49 PM   #2
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Default Re: HOW TO: set readiness monitors for OBD 2 (Wazup)

that is a general OBD2 procedure, it varies for most makes and models
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Old 11-06-2006, 01:54 PM   #3
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Default Re: HOW TO: set readiness monitors for OBD 2 (sicones)

yeah thats what i figured.. but i thought i might at least alert people (esp. califonia people) to what smog techs look for when testing.. Basically, just be sure your readiness codes are ready... OBD 2 is such a pain
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Old 04-13-2017, 05:48 PM   #4
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Default Re: HOW TO: set readiness monitors for OBD 2

If you have reset your ECU or Disconnected the Battery and/or erased the code/or codes after a repair. You will need to drive up to 200 miles, in order for the OBD2 to set all of the sensor reading to ( Ready Status ). The reason for this is, the system needs time to accumulate new Data. This new Data will also tell you weather or not you have fixed the issue correctly, If you get another ( Check Engine ) within that time you may have another issue and will need to do a OBD2 retest.

Last edited by LoveHRD; 04-13-2017 at 06:17 PM.
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2006, accord, civic, cycle, drive, driving, honda, monitors, obd, obd2, obdii, procedure, readiness, rsx, smog

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